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Option One

Undercut anchors are not typical anchors: When you look at the bottom of the hole, you will see an undercut or notched opening, made with an anchor that comes with a drilling tool at the end of that tool or with a special drill bit. They are often used in applications that are regarded as high-risk in such dangerous areas like nuclear power plants, or even in applications that are classified as high loading (for instance roller coasters). In general, in places where the risk to human safety due to anchor failure is high or even where anchor failure can cause other catastrophic consequences.

During anchor installation, the expansion segments are normally safely driven in the pre-drilled hole. Then the undercut will be created through a spring action, which will automatically expand the segments of the undercut/the anchor undercut keys into the void which has been pre-cut within the concrete. That’s what is referred to as the positive mechanical interlock, or the undercut connection. It typically does that without causing expansion pressure in the concrete. That positive undercut mechanism is the thing that guarantees the reliable action load transmission from an application to the ceiling, floor or concrete wall.

What are the benefits found in undercut anchors?

– They are ideal in applications where there’s a need for reducing the anchor spacing and edge distances in the concrete.

– Undercut anchors are always produced from materials that are of high strength and are durable, which offers additional guarantee when it comes to safety.

– Another benefit that comes with undercut anchors is that it offers an extra guaranteed safety as a result of the positive undercutting mechanism.

– They are also ultra-reliable as well as an easy solution or easy fix for high loads in cracked and non-cracked concrete.

– Undercut anchors are available in ‘prefix’ and ‘through fix form. They offer design resistance plus they function perfectly in cracked concrete.

When you choose what anchors to use, you should always put their suitability and use into consideration to make sure that European Technical Approvals / Assessments has assessed as well as approved the anchors for safe use. European Technical Approvals / Assessments is a board that makes sure that all anchors are assessed by testing and also approved to be considered suitable for use in particular base materials plus conditions.


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Option 1

Undercut anchors are often used in lots of ETA Option one application areas. Option 1 being the designation for what’s in the tension zone class in a part for concrete. This may be a concrete ceiling, concrete floor or concrete wall.

When referring to the tension zone, we basically mean a section of the concrete that is capable of being cracked. An anchor that has been successfully tested as well as received approval of meeting ETA Option one requirements means that it’s suitable for use in these areas.

Option 7

There are numerous benefits that come with undercut anchors, which are not only restricted to the aforementioned areas of application: this also applies to Option 7. Lots of Option seven areas of application also have requirements for close anchor spacings, close concrete edge distances as well as ultra-high loads. Option seven being the ETA classification for the state of concrete that isn’t acting in tension and the same thing applies to non-cracked.